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创建一个简单的模拟登陆功能的网页，没有用数据库技术，只是简单的学习jsp语法
首先创建一个登陆页面
<%@ page language = "java" import="java.util.*" pageEncoding="utf-8" %> <% String path = request.getContextPath(); String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; %> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <base href="<%=basePath%>"> <title>My JSP ‘index.jsp‘ starting page</title> <meta http-equiv="pragma" content="no-cache"> <meta http-equiv="cache-control" content="no-cache"> <meta http-equiv="expires" content="0"> <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> <meta http-equiv="description" content="This is my page"> <!-- <link rel="stylesheet" type="text/css" href="styles.css"> --> </head> <body> <form action = "judge.jsp"> name<input type = "text" name = "name"> password<input type = "password" name = "password"> <input type = "submit" value = "提交"> </form> </body> </html>
然后创建一个判断用户名和密码的jsp文件，这里默认用cheng做用户名，song做密码
<%@ page language = "java" pageEncoding="utf-8" %> <html> <head> <title>forward 动作</title> </head> <body> <jsp:useBean id="tb" scope = "request" class ="bean.testbean"></jsp:useBean> <jsp:setProperty property="*" name="tb"/> <%-- <%@include file = "jisuan.jsp" %> --%> <% String name = tb.getName(); String password = tb.getPassword(); if(name.equals("cheng")&&password.equals("song")){ %> <jsp:forward page="success.jsp"></jsp:forward> <% }else{ %> <jsp:forward page="fail.jsp"></jsp:forward> <% } %> </body> </html>
在判断之后，根据判断结果进入两个网页，一个是成功登陆，一个是登录失败
<%@ page language = "java" pageEncoding="utf-8" %> <html> <head> <title>登陆成功</title> </head> <body> <jsp:useBean id="tb" scope = "request" class = "bean.testbean"></jsp:useBean> 登陆成功 <hr> 你的用户名是:<jsp:getProperty property="name" name="tb"/></br> 你输入的密码是:<jsp:getProperty property="password" name="tb"/> </body> </html>
<%@ page language = "java" pageEncoding="utf-8" %> <html> <head> <title>登录失败</title> </head> <body> <jsp:useBean id="tb" scope = "request" class = "bean.testbean"></jsp:useBean> 登录失败 你输入的用户名<jsp:getProperty property="name" name="tb"/>错误</br> 你输入的密码：<jsp:getProperty property="password" name="tb"/> </body> </html>
其中的Javabean如下
package bean; public class testbean { public String name ; public String password; public testbean(){}/*该处的public开始时掉了，导致后来一直报错，调试半天，切记切记，当程序说找不到bean文件时，一定要看看是不是忘了public*/ public String getName() { return name; } public void setName(String name) { this.name = name; } public String getPassword() { return password; } public void setPassword(String password) { this.password = password; } }
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原文地址：http://www.cnblogs.com/chengsong/p/5093562.html
